C. difficile infection requires documenting the presence of toxin in the stools, usually by testing for the gene that produces toxin B, using a method called PCR. It is very sensitive, so it should not be used to test solid stools since that is likely a carrier state.
Definition of vassal. 1  1 : a person under the protection of a feudal lord to whom he has vowed homage and fealty : a feudal tenant. 2  2 : one in a subservient or subordinate position.
In contrast, a fidelity, or fidelitas, was a sworn, unconditional loyalty to a monarch. In fully developed vassalage, the lord and the vassal would take part in a commendation ceremony composed of two parts, the homage and the fealty, including the use of Christian sacraments to show its sacred importance.